Question

Nina is 10 years younger than Deepak. Deepak is 3 times as old as Nina. Which system of equations can be used to find d, Deepak's age, and n, Nina's age?

Answer 1

n = Nina's age
d = Deepak's age

n = d - 10    -----> Since n is 10 less than d, we take 10 away from d
d = 3n         -----> Since d is 3 times older than n, we times n by 3

Answer 2

Answer:

The answer would be:           A.     d = n + 10  d = 3n